1563228968 has 24 divisors (see below), whose sum is σ = 3409594650. Its totient is φ = 669955104.

The previous prime is 1563228943. The next prime is 1563228991. The reversal of 1563228968 is 8698223651.

It can be written as a sum of positive squares in only one way, i.e., 1034136964 + 529092004 = 32158^2 + 23002^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1993523 + ... + 1994306.

Almost surely, 2^1563228968 is an apocalyptic number.

It is an amenable number.

1563228968 is an abundant number, since it is smaller than the sum of its proper divisors (1846365682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1563228968 is a wasteful number, since it uses less digits than its factorization.

1563228968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987849 (or 3987838 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 1563228968 is about 39537.6904737745. The cubic root of 1563228968 is about 1160.5776373992.

The spelling of 1563228968 in words is "one billion, five hundred sixty-three million, two hundred twenty-eight thousand, nine hundred sixty-eight".